John f



(No Model.)

J.P. APPLEBY.

KNOTTING MECHANISM FOR GRAIN BINDERS.

N0. 312,790. Patented Feb. 24, 1885.

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ENT tries.

JOHN F. APPLEBY, OF MINNEAPOLIS,

MINNESOTA, ASSIGNOR TO THE MIN- NEAPOLIS HARVESTER VVOR-KS, OF SAMEPLACE.

KNOTTING MECHANISM FOR GRAIN-BINDERS.

..;PECII-"ICATION forming part of Letters Patent No. 312,790, datedFebruary Z, 1885.

(No model.)

To all whom it may concern:

Be it known that 1, JOHN F. APPLEBY, of Minneapolis, Minnesota,haveinvented an Improvement in Knotting Mechanism for Grain- Binder ofwhich the following is aspecification.

It is the object of my invention to simplify the knot-tying mechanismemployed in grainbinders, first, by so organizing the parts that asingle cam serves to actuate the mechanism for gripping thebinding-cord, and also the mechanism for cutting the cord anddisengaging'it from the knotter after the knot is formed; secondly, bydispensing with the movable cutters 1 and knot-strippers heretoforeused. I accomplish the latter object by'giving to the knotter shaft, inaddition to its usual capacity of rotation upon its longitudinal axis, ato-andfro lateral motion. By this motion, after the knot is 29 formed,the knotter first draws the cord across a stationary knife, by whichthecord is cut, and then disengages itself from the knot which has beenformed and returns to its normal position. My knotter is thus aself-stripper.

The drawings, which represent knot-tying apparatus embodying myimprovements, together with some of the adjacent partsof a grain-binderto which the knot-tying apparatus is applied, are as follows:

30 Figure 1 is a top view. Fig. 2 is an elevation, partly in verticalsection, through the line 00 won Fig. 1. Fig. 3 is a vertical sectionthrough the line .2 2 on Fig. 2. Fig. 4 is a horizontal section throughthe line y 3/ on Fig. 2.

Fig. 5 is a vertical section of the binder'table immediately beneath thek notting mechanism, showing the cord-needle and its path of motionrelatively to the parts shown in Fig. 3.

The knot-tying mechanism represented in 0 the drawings is composed ofthe usual knotter, A, which consists of the vertical shaft A, having abevel-pinion, A, affixed to its upper end, and having at the bottom theusual laterally-projecting hook, a, to which is pivoted 5 the ordinaryspring-jaw,B. The arm b, projecting backward and upward from the hub ofthe jaw B, is provided with an anti-friction roller, b, which by theaction of the jaw-spring b is held up against the cam B, formed upon thelower end of the tube 0, in which the knot- 5c tor-shaft A is insertedand has its bearings. As 7 the knotter-shaft turns in its bearingswithin the tube 0, the jaw B is opened or closed accordingly as theroller 1) bears upon the projecting or recessed parts of the cam B. Therotation of the knotter upon its vertical axis is effected by means ofthe segmental rack D, formed upon the periphery of the canrwheel E,which rack at the proper time engages the pinion D, affixed to thehorizontal shaft d, 63 carrying the bevel-wheel D which meshes into thebevel-pinion A and by such engagement turns the knotter once around uponits vertical or longitudinal axis. Prior to such engagement, the endpfthe cord being held 65 in the gripper, and the cord passing thence overthe hook B and around the gavel to the needle, the cord arm or needle Fhas completed its upward swing, carrying the new end of the cord acrossthe top of the knotter- 'jaw B, and a vibrating claw, Gr, operated by asector-plate, G, having an arm, 9, engaging a cam-groove, 9, formed uponthe outer face of the cam-Wheel E, has caught the cord farther back andhas carried it under the k notter-hook alongside the old end of thecord, thus forminga bight in which the hook and jaw lie,

so that when the knotter rotates the doubled cord is wound once aroundit. In making the turn the jaw B is raised by the bearing of theroller 1) upon the projecting part of the cam 13, and the doubled cordis caught between the hook a and the jaw B. At the conclusion of therevolution of the knotter the roller 1) rides into the recessed partofthe cam B, and the jaw B is thus permitted to spring down and grip thedoubled cord upon the top of the hook a.

The mechanism thus far described, both in itself and in its mode ofoperation, is very 0 similar to the knotting mechanism heretoforeemployed in grain-binders, and it is in the mechanism for theperformance of the coneluding steps of the knotting operation that thenovelty and usefulness'of my invention 5 are chiefly manifested. Thesesteps are, first, the cutting of the double cord a short distance fromthe part which is held by the knotter,

and next the stripping off of the loop which I pawl Kis pivoted to onearm of the bell-crank has been wound around the knotter, while the cutends of the cord are gripped between the jaw B and the hook a, wherebythe cut ends are made to pass through the loop, and the knot is thusformed. By my invention these two steps are accomplished by anovelcombination of devices for imparting to the knottershaft at theconclusion of its revolution upon its longitudinal axis alaterally-outward motion in the vertical plane of its said axis, as thefirst result of which the doubled cord is cut between the knotter andthe gripping disk H by being drawn across the edge of the stationaryknife I, aflixed to the standard J. As the second result the k notterdraws itself out of the loop, and in so doing draws the cut ends'of thedoubled cord through the loop, thus completing the knot.

The drawings illustrate the method of giving the required lateral motionto the knotter.

The tube or bearing G is provided near the top upon opposite sides withthe horizontally-projecting trunnions C and C". which have theirbearings, respectively, in the standard J and the elbow j, projectinghorizontally from the standard J. Au arm, 0, extending from the upperpart of the tube or bearing 0 toward the cam-wheel E, is provided withan anti-friction roller, C, which is engaged by the cam-groove 6, formedin the inner face of the canrwheel B. So long as the roller 0 is engagedby the con centric part of the canrgroove e the k nottershai't remainsvertical; but when the rotation of the cam E has so far progressed thatthe rack D has performed its function of rotating the knotter theinwardly-curved part c of the cam-groove e engages the roller G androcks the arm 0 downward upon the horizontal axis afforded by thetrunnions O and Ci thus rocking the lower end of the tube 0 outward, andthereby giving to the knotter the lateral motion which has beendescribed. The range of this motion is suiiicient to effect thedisengagement of the knotter from the knot, after which the knotter isswung back to its normal position as the roller 6 rides outwardly to theconcentric part of the cam-groove c. It will be seen that the angle'ofthe bevel of the pinion A is substantially perpendicular to a radialline extending from the horizontal axis aiforded by the trunnions G andC to the middle of the bevel, and it follows that the swinging of thetube 0 does not fully withdraw the teeth of the pinion A fromengagementwith the teeth of the bevel-wheel D", and causes no rotationof the pinion.

It is a feature of the organization shown that the same cam whichactuates the cutting and knot-stripping mechanism is also employed toreciprocate the pawl K, which impels the ratchet-wheel h of thegripping-disk'H. The

lever K, the other arm of which carries the anti-frietion-roller K whichby engagement with the cam-groove 6 causes the bell-crank lever to berocked back and forth once during each revolution of the cam-wheel E,andthereby at the proper time turns the gripping disk H, as usual, onestep in order to present a new notch for the reception of the cord nextbrought forward by the cord-needle. The cord is clamped against the diskH by the usual clamping-plate, H, which is pivoted to the side ofthestandard J. I adjust the clamping force of this plate by means of theadjustable expanding spiral spring H surrounding the bolt H, the head ofwhich bears against the clampingplate, while its shank is looselyinserted in the tubular screw-bolt H inserted in a hole tapped throughthe flange J of the standard J. By screwing in the bolt H the spiralspring H which bears against the inner end of the bolt H and the head ofbolt H, is additionally compressed, and, by screwing out the bolt H thetension of the spring H is correspondingly diminished.

I claim as my invention-- l. The combination, substantially as beforeset forth, of the knotter-shaft, the pivoted bearing thereforconstructed with a projecting arm, and the canrwheel provided with aeam-groove which engages the arm of the said pivoted bearing.

2. The combination, substantially as before set forth, of the cam-wheelprovided with a cam-groove, the k notter-shaft and its pivoted bearingconstructed with a projecting arm which is engaged by the saidcam-groove, the

cord-holder, and mechanism, substantially such as described, actuated bythe same camgroove for independently operating the cord holder.

3. The combination, substantially as before set forth, of theintermittingly-rotating bevelwheel D the knotter-shalt provided with thebevel-pinion A", the knotter-shaft bearing pivoted to theknotter-fraineon an axis transverse to the axis of the bevel-wheel D, and a cam forswinging said pivoted bearing, whereby the swinging of the knottereffects practically no disengagement and no rotation of the saidbevel-gearing.

4. In a grain-binder, the combination,with the knotter and the cutter,of mechanism for disengaging the k hotter from the loop and severing thebinding-cord, the gripping-disk H, the impelling-pawl K, and a singlecam for actuating both said pawl and said disengaging and cord severingmechanism, as described.

JOHN F. APPLEBY.

itnesses:

E. B. GUMPERT, O. M. CASTLE.

